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beers-law
beers-law


Author Comment Last activity Moderation
vanirishdelapena "@ddnoob hello sir I was wondering how did you connect the ccd sensor to the arduino uno? any response would be helpful. " | Read more » about 4 years ago
warren "Oh, interesting! Maybe @programmer1200 would be interested in this, re: related work on a turbidity sensor... " | Read more » about 5 years ago
Ag8n "The current epa method for turbidity, with standard prep, is at: Https://epa.gov/sites/production/files//2015-08/documents/method_180-1_1993.pdf ..." | Read more » about 5 years ago
Ag8n "Absolutely correct. The fluorescence spectrometer is the same layout as for the basic turbidimeter. The standards are a bit of a pain, but quite ..." | Read more » about 5 years ago
warren "So a design using the Lego Spectrometer, for example, might need a right-angle light source -- but that's not so bad, since already with fluorescen..." | Read more » about 5 years ago
warren "Hm, good point -- actually going back to an old post there's some great stuff here: https://publiclab.org/notes/donblair/08-25-2015/turbidity-001 ..." | Read more » about 5 years ago
Ag8n "By definition, turbidity measures the amount of light scattered at a 90 angle. So there would have to be a change in the optical layout from the ..." | Read more » about 5 years ago
Sahil "Can this spectrometer identify the type of material.... for ex.:- spectrum of an apple. Or spectrum of wood??????? " | Read more » about 5 years ago
warren "Related: How can we detect contaminants in water samples with a DIY spectrometer using reagents? https://publiclab.org/notes/warren/12-18-2017/ca..." | Read more » about 5 years ago
warren "OK, my next thought on this would be to scan 2 at once instead of 3, so that at least any non-evenness would be symmetric horizontally. But I'm not..." | Read more » about 5 years ago
programmer1200 "Hi Warren I'm also working on a beers law based machine for testing one cuvette at a time and measuring the amount of light penetrating through the..." | Read more » about 5 years ago
warren "I think the light is not evenly distributed, and in the scan I took, there's just more light in the middle. I'd like to correct for this but it's e..." | Read more » about 5 years ago
warren "Also noting that @ygzstc cited some work supporting the use of the area under the curve in a spectrum data reading instead of intensity at one wave..." | Read more » about 5 years ago
warren "Just to clarify here, I believe to sum up we can say that: IF a reagent reacts linearly (for example, if doubling the concentration of the thing t..." | Read more » about 5 years ago
warren "Copying in answer from @stoft, here: It is my understanding that Beer's law is not the relationship between reagent's effect on color, but is the ..." | Read more » about 5 years ago
bhickman "Hi tekno. I would definitely go with the 3D printed version if thats available for you. The 3D printed version makes alignment much easier. " | Read more » about 6 years ago
tekno "I found that you have 2 CCD Photodiode Array Spectrometer projects here and was wondering of the 2 which one would be better to work on https://pu..." | Read more » about 6 years ago
ddnoob "Thank you very much, bhickman " | Read more » about 6 years ago
bhickman "Hi ddnoob. I have not quantified the resolution, but by my estimate, the wavelength resolution is around 1nm when everything is optimized. The inte..." | Read more » about 6 years ago
ddnoob "Dear bhickman, I have 2 questions: 1.How is resolution of the spectrometer? 2. Can you change resolution of this spe..." | Read more » about 6 years ago
bhickman "I updated the link. Thanks. " | Read more » over 6 years ago
tekno "thanks " | Read more » over 6 years ago
ddnoob " WheeTrometer_3.0-master_-2-.zip Tekno " | Read more » over 6 years ago
tekno "hey - i was wondering if I was the only one not being able to get the link https://github.com/SmokyMountainScientific/WheeTrometer_3.0/tree/master/..." | Read more » over 6 years ago